weight=input("请输入您的体重")
height=input("请输入您的身高")
weight=float(weight)
height=float(height)
result=weight/(height*height)
print("您的BIM值为：",result)
if result<18.5 :
    print("您的体重过轻")
elif result>=18.5 and result<25 :
    print("您的体重正常")
elif result>=25 and result<28 :
    print("您的体重过重")
elif result>=28 and result<32 :
    print("您已达肥胖")
elif result>32 :
    print("您已严重肥胖")